These ebuilds come from http://gitorious.org/roslin/roslin.
If you have some problems, go to the official site first.
f2fs-tools : Tools for Flash-Friendly File System (F2FS) ( http://sourceforge.net/projects/f2fs-tools/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a roslin
For Paludis use this rsync : rsync://gentoo.zugaina.org/roslin-portage
If you have a problem : ycarus(-at-)zugaina.org